Stability (not rocking) and retention (grip) come from the metal framework gripping the natural teeth so will be affected by both the number and position of your remaining teeth.
The denture design
is also critical. Time must be spent on the planning and preparing the teeth to make sure the denture has the best possible grip and resistance to your chewing forces.
They can be ‘tooth borne', (supported just by your teeth) which is always preferred where possible or ‘tooth and mucosal borne’ denture, (supported by both teeth and mucosa).